A saying, spoken out loud, while acting as a slow or mentally challenged person when someone makes an incorrect action or is unwillingly blind to something obvious.
by Pink Clay doh April 06, 2010
There is a purple derp down in Florida.
by Werty27 April 21, 2011
by mmmmmhm October 17, 2010
Is a word that describes a particularly retarded face: A retarded smile, and the eyes pointing in different directions aswell as a wierd fraze such as...Derpdy
Normal person: "Hey, whats up?"
Connor White: "Derp herpa flerp merp der gerp"
Normal person: "Speak normal you derpy dick"
Connor White: "DERPPPPPPPP"
Normal Person: "Calm down"
Connor White:"wa"
Connor White: "Derp herpa flerp merp der gerp"
Normal person: "Speak normal you derpy dick"
Connor White: "DERPPPPPPPP"
Normal Person: "Calm down"
Connor White:"wa"
by Hammond511 March 14, 2012
by Kadish_W January 06, 2019
by THE O SO GREAT NERD February 21, 2019
by InfamousJonah December 16, 2017